code: def testEmpty(self):
      emptyAudio = []
      self.assertRaises(
          RuntimeError, lambda: LoopBpmEstimator()(emptyAudio)
      )
  
file_path: essentia/test/src/unittests/rhythm/test_loopbpmestimator.py
imports: from essentia_test import *
  from essentia.standard import MonoLoader, LoopBpmEstimator
  import numpy
label_desc: Use image node_id 3 for calling the TestLoopBpmEstimator obj's underlying member method code with example usage: obj.testEmpty() without return types